378505873 has 2 divisors, whose sum is σ = 378505874. Its totient is φ = 378505872.

The previous prime is 378505837. The next prime is 378505889.

378505873 is nontrivially palindromic in base 10.

Together with previous prime (378505837) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 359216209 + 19289664 = 18953^2 + 4392^2 .

It is a palprime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-378505873 is a prime.

It is not a weakly prime, because it can be changed into another prime (378505373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 189252936 + 189252937.

It is an arithmetic number, because the mean of its divisors is an integer number (189252937).

Almost surely, 2^378505873 is an apocalyptic number.

It is an amenable number.

378505873 is a deficient number, since it is larger than the sum of its proper divisors (1).

378505873 is an equidigital number, since it uses as much as digits as its factorization.

378505873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 705600, while the sum is 46.

The square root of 378505873 is about 19455.2273952272. The cubic root of 378505873 is about 723.3650820065.

The spelling of 378505873 in words is "three hundred seventy-eight million, five hundred five thousand, eight hundred seventy-three".